Retinoid Season Is Their Autumn. Ours Is a UV Climb.

Ingredients · Published 2026-09-19 · 9 min read · 2091 words

Start one night in three. Keep tinted SPF every morning. Do not add a spring peel because a Northern Hemisphere calendar said so.

Key takeaways

• One night in three is a start. Every night in week one is a stop.
• Spring UV here is not European autumn UV.
• Tinted SPF covers the visible-light gap pigment-prone faces need.
• If the barrier is already wind-raw, wait.

Source: Isaacs et al. IJD 2025 / Wright SAMRC UV climate work / retinoid irritation and PIH literature (https://pmc.ncbi.nlm.nih.gov/articles/PMC12712754/)

Cover image: Unsplash — credit